var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');

var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');
var session = require("express-session")({
  secret: "hello",
  resave: true,
  saveUninitialized: true
});
var sharedsession = require("express-socket.io-session");

var app = express();
const server = require('http').Server(app);
const io = require('socket.io')(server);
server.listen(3000);
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({
  extended: false
}));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use(session);
io.use(sharedsession(session, {
    autoSave:true
})); 


app.use('/', indexRouter);
app.use('/users', usersRouter);

const messages = [], users = [];
io.on('connection', socket => {
  socket.emit('all', messages);
  io.emit('users', users);
  socket.on('message', data => {
    messages.push(data);
    // socket.handshake.session.messages = messages;
    // socket.handshake.session.save();
    io.emit('broadcast', data);
  })
});

app.post('/', (req, res) => {
  users.push(req.body.username);
  io.emit('users', users);
  req.session.username = req.body.username;
  res.redirect('/');
})
// catch 404 and forward to error handler
app.use(function (req, res, next) {
  next(createError(404));
});

// error handler
app.use(function (err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;